<template>
  <div id="app">
    <!-- 顶部标题 -->
    <mt-header fixed title="Mzy-Vue-project">
        <span slot="left" @click="goBack" v-show="flag">
            <mt-button icon="back">返回</mt-button>
        </span>
    </mt-header>

  <!-- 中间内容部分 -->
  <transition name="app">
      <router-view></router-view>
  </transition>
  
      <!-- 底部导航 -->
  <nav class="mui-bar mui-bar-tab">
      <router-link class="mui-tab-itemm" to="/home">
        <span class="mui-icon mui-icon-home"></span>
        <span class="mui-tab-label">首页</span>
      </router-link>
      <router-link class="mui-tab-itemm" to="/member">
        <span class="mui-icon mui-icon-contact"></span>
        <span class="mui-tab-label">会员</span>
      </router-link>
      <router-link class="mui-tab-itemm" to="/shopCar">
        <span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="badge">{{$store.getters.getAllCount}}</span></span>
        <span class="mui-tab-label">购物车</span>
      </router-link>
      <router-link class="mui-tab-itemm" to="/profile">
        <span class="mui-icon mui-icon-home-filled"></span>
        <span class="mui-tab-label">我的</span>
      </router-link>
    </nav>

  </div>
</template>

<script>
    export default {
        name: 'app',
        data(){
            return {
                flag:true
            }
        },
        methods:{
            goBack(){
                this.$router.go(-1)
            }
        },
        created(){
            this.flag = this.$route.path === "/home" ? false:true
        },
        watch:{
            "$route.path":function(newVal){
                if (newVal === "/home"){
                    this.flag = false
                } else {
                    this.flag = true
                }
            }
        }
    }
</script>

<style lang='scss' >
    .app-enter {
        opacity: 0;
        transform: translateX(100%)
    }
    
    .app-leave-to {
        opacity: 0;
        transform: translateX(-100%);
        position: absolute;
    }
    
    .app-enter-active,
    .app-leave-active {
        transition: all .6s ease
    }
    
    #app {
        padding-top: 40px;
        padding-bottom: 50px;
        background-color: #fff;
        position: absolute;
        height: 100%;
        width: 100%;
        overflow-x: hidden;
        .mui-bar-tab .mui-tab-itemm.mui-active {
        color: #007aff;
        }

        .mui-bar-tab .mui-tab-itemm {
        display: table-cell;
        overflow: hidden;
        width: 1%;
        height: 50px;
        text-align: center;
        vertical-align: middle;
        white-space: nowrap;
        text-overflow: ellipsis;
        color: #929292;
        }

        .mui-bar-tab .mui-tab-itemm .mui-icon {
        top: 3px;
        width: 24px;
        height: 24px;
        padding-top: 0;
        padding-bottom: 0;
        }

        .mui-bar-tab .mui-tab-itemm .mui-icon ~ .mui-tab-label {
        font-size: 11px;
        display: block;
        overflow: hidden;
        text-overflow: ellipsis;
        }
    }
</style>